10,664 research outputs found
The design of a multi-channel spin polarimeter
All commercial electron spin polarimeters work in single channel mode, which
is the bottleneck of researches by spin-resolved photoelectron spectroscopy. By
adopting the time inversion antisymmetry of magnetic field, we developed a
multichannel spin polarimeter based on normal incident VLEED. The key point to
achieve the multi-channel measurements is the spatial resolution of the
electron optics. The test of the electron optics shows that the designed
spatial resolution can be achieved and an image type spin polarimeter with 100
times 100, totally ten thousand channels is possible to be realized.Comment: submitted to Chinese Physics
Optimizing production scheduling of steel plate hot rolling for economic load dispatch under time-of-use electricity pricing
Time-of-Use (TOU) electricity pricing provides an opportunity for industrial
users to cut electricity costs. Although many methods for Economic Load
Dispatch (ELD) under TOU pricing in continuous industrial processing have been
proposed, there are still difficulties in batch-type processing since power
load units are not directly adjustable and nonlinearly depend on production
planning and scheduling. In this paper, for hot rolling, a typical batch-type
and energy intensive process in steel industry, a production scheduling
optimization model for ELD is proposed under TOU pricing, in which the
objective is to minimize electricity costs while considering penalties caused
by jumps between adjacent slabs. A NSGA-II based multi-objective production
scheduling algorithm is developed to obtain Pareto-optimal solutions, and then
TOPSIS based multi-criteria decision-making is performed to recommend an
optimal solution to facilitate filed operation. Experimental results and
analyses show that the proposed method cuts electricity costs in production,
especially in case of allowance for penalty score increase in a certain range.
Further analyses show that the proposed method has effect on peak load
regulation of power grid.Comment: 13 pages, 6 figures, 4 table
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